cannot convert from f16 to i32 when targeting loongarch64

[nektro]

Zig Version

0.13.0

Steps to Reproduce and Observed Behavior

const std = @import("std");

test {
 var a: f16 = 42.0;
 _ = &a;

 var b: i32 = @intFromFloat(a);
 _ = &b;

 try std.testing.expect(b == 42);
}

$ zig test test.zig -target loongarch64-linux-musl
LLVM ERROR: Cannot select: 0x7fb49a509b20: i64 = fp_to_fp16 0x7fb49956ba80
 0x7fb49956ba80: f32,ch = CopyFromReg 0x7fb4999973e0, Register:f32 %11
 0x7fb49956f010: f32 = Register %11
In function: __fixhfsi
Aborted (core dumped)

Expected Behavior

all 1 tests passed

[nektro]

can confirm this also affects 0.14.0-dev.1504+5f3d9e0b7

[alexrp]

llvm/llvm-project#93894

[nektro]

nice, llvm/llvm-project@d075b7b made it into llvm 19

[alexrp]

Now for the not-so-nice news: ziglang/zig-bootstrap#164 (comment)

[yxd-ym]

ziglang/zig-bootstrap#164 (comment)

managed to pass this test with zig bootstrapped for loongarch64-linux-musl in comment above.

yxd@derp ~/tmp/test_zig $ file ~/opt/zig/musl-19/zig
/home/yxd/opt/zig/musl-19/zig: ELF 64-bit LSB executable, LoongArch, version 1 (GNU/Linux), statically linked, stripped
yxd@derp ~/tmp/test_zig $ ~/opt/zig/musl-19/zig version
0.14.0-dev.1499+0006b56f4
yxd@derp ~/tmp/test_zig $ cat test.zig
const std = @import("std");

test {
 var a: f16 = 42.0;
 _ = &a;

 var b: i32 = @intFromFloat(a);
 _ = &b;

 try std.testing.expect(b == 42);
}
yxd@derp ~/tmp/test_zig $ ~/opt/zig/musl-19/zig test test.zig -target loongarch64-linux-musl
All 1 tests passed.

[yxd-ym]

Now try to fix this issue with

llvm/llvm-project#107791

[andrewrk]

Fixed with the merge of LLVM 19 branch in c6ad452.